Locking-valve



F. L. PEARSON LOCKING VALVE.

APPLICATION FILED MAR-29.1917

Patented May 20, '191-9.

FIZZ 6 I if [1; 7 INVENTOR.

I71 PEHES'J/I! Y am 6, 6M

ATTORNEYS.

FRED L. PEARSON, or SIOUX CITY, IOWA.

LOCKING-VALVE.

Specification of Letters Patent. Patented lvlay 20, 1919.

Application filed March 29, 1917. Serial Nd. 158,472.

To all whom it may concern:

Be it known that I, FRED L. PEARSON, a citizen of the United States, and a resident of Sioux City, in the county of Woodbury and State of Iowa, have invented certain new and useful Improvements in Looking- Valves, of which the following is a specification.

V The present invention relates to locking valves for controlling fluid passages.

The invention has for its rimary object the production of a valve em odying an improved key-controlled lock for positively locking the valve.

Another object of the invention is the production of an improved key-controlled look ing valve simple and inexpensive in construction yet thoroughly dependable and particularly adapted to be interposed in the passage between the manifold and combus tion chambers of the engine of a motorvehicle to prevent theft or operation of the vehicle by unauthorized persons.

Still a further object of the invention is the production in a motor-vehicle of a looking valve adapted to be mounted under the hood, and adapted to be operated. without raising the hood;

The invention contemplates, broadly, mechanism including a valve casing having an induction opening and inclosing a sliding valve adapted to open and close the said opening. The valve is provided with an improved formof lock'whichpositively prevents movement of the valve except by use of the particular key provided therefor, all of which will be clearly understood from the following description, reference being had to the accompanying drawings, which form a part of this application and in which like characters of reference indicate corresponding parts throughout the several views; of which,- I

5 Figure 1 is 11a transverse section of the pre-' ferred embodiment ofthe device;

Fig. 2 is a longitudinal section of the same; I r V Fig. 3 is an enlarged horizontal section of the valve taken on the line 3- -3 of Fig. 1;

Fig. 4 is an enlarged transverse section of the lock taken on the line 44 of Fig. 3;

Fig.- 5is' a side elevation of a motor vehicle engine and its hood equipped with the device of my invention, the hood being open;

Fig. 6 is a similar -"view with the hood closed; and

Fig. is a plan of the key.

Although, I haveillustrated and herein after described thepreferred embodiment of the invention, I would not be understood as being limited to the specific structure chosen for illustration, for various alterations and modifications in the details of construction and arrangement of parts may be made without departing from the spiritand scope of the invention as defined in the appended claims W Referring, now, to the illustrations, 8, is thevalve casing preferably cylindrical and provided with an induction opening, 9. Within the casing is a segmental valve, 10, which conforms to the curvature'of the casing and is'carried between'disks, 11, positioned adjacent the opposite ends ofthe casing. Above the valve thedisks'are interconnected by 'or formed integrally with a block, 12, which serves to hold the disks in their proper relation and also serves as a cover for the'locking mechanism as will pres; ently appear.

The front disk engages an internal'shoulder, 13, of the casing and the opposite end of the casing is provided with a cover; preferably consisting of a plate of yieldable sheet metal, 14, dished outwardly and inwardly depressed at'its center to impinge the center of the adjacent disk to hold the companion disk firmly against the shoulder 13, to prevent'leakage of'fiuid between the said shoul der and disk.

The casing is preferably provided on opposite sides with short flanged outlet pipes, 15, adapted to be interposed in the horizontal portion of the usual manifold, 16, of the engine. The induction opening, 9, is also preferably a short flanged pipe to which the carbureter, 17, may be connected. In order to obviate lifting the hood, 18, to afford ac' cess to the valve, I provide in the hood a hand-hole, 19, normally closed by a small door, 20, hinged or otherwise suitably seguped on the hood to open and close the said 0 e. The front disk is provided witha' suitable handle, 21, by which the disk may be turned within the casing to slide the valve between its opened and closed positions. The valve is shown in Figs. 1 and 2 as closing the induction opening in which position it is securely locked by mechanism carried by the valve. The lock consists preferably of one or more pairs of plungers, 22, slidably inclosed within a recess, 28, in the valve and adjacent the block, 12. The plungers move alternately in opposite directions each witlr respect to its mate, the adjoining faces of the plungers being cut away and provided with rack teeth, 24, intermeshed with pinions 25, fixed on spindles, 26, rotatably mounted in the body of the valve.

Means are provided for automatically retracting the plungers and holding them yieldably in their extended positions as clearly shown in Figs. 1 and 8. This means preferably consists of coil springs, 27, each having one end secured to the valve and its opposite end to the spindle. The inner end of one plunger of each pair is tapered as at 28, and normally extends into a key hole, 29, disposed laterally to the plungers. 80, is the key which is designed to slide longitudinally into the key hole and its end is tapered as at 31, to coact with the tapered ends of the plungers to force .the latter outwardly as the key is inserted. The key is provided in its sides with tapered notches, 32, to receive the tapered ends of the plungers, the said notches being sufficiently deep to hold the plungers so that the outer ends of all are flush, as shown in dotted lines in Fig. 3.

The taper-ended plungers are preferably of difierent lengths, thereby requiring the respective notches, 32, to be of correspondingly different depths. The casing wall is recessed, as at 38, to receive the plunger and thereby prevent rotation of the valve. It is evident that if the notches, 32, which coact with the tapered ends of the plungers are too shallow, that the said plungers will be forced outwardly into engagement with the sockets or recesses, 33. Likewise if the notches are too deep the said plungers will not be forced outwardly far enough to withdraw the companion plungers from the recess.

Therefore, it is clear that this construction permits of a wide variation in keys and, in practice, the device may be so constructed that a key will open no lock except the particular one for which it is intended. It is evident that the number of pairs of plungers may be varied as desired by the manufacturer.

In opening the lock it is clear, that it is only necessary to thrust the key inwardly and through the medium of the handle 21, the valve may be rotated a half revolution to the open position indicated in dotted lines in Fig. 1, in which position the plungers will be received in a recessed part, 34, to lock the valve in its open position and permit removal of the key.

As previously stated it is not necessary to raise the hood to gain access to the valve as it is only necessary to open the small door 20, to permit insertion and removal of the key for operation of the valve.

Having thus described my invention what I claim as new and desire to secure by Letters Patent of the United States, is,

1. A locking valve comprising a casing member having an opening therein for the passage of fluid, a valve member movable within the casing to open and close the opening, and a lock carried by one of said members including aplurality of pairs of plungers each movable in opposite directions alternately with respect to its mate, one plunger of each pair being normally engaged with the other of said members to prevent movement of the valve member, and the other plunger of each pair being keycontrolled and operable to withdraw its mate from the engaged member.

2. A locking valve comprising a casing member having an opening therein for the passage of fluid, a valve member movable within the casing to open and close the opening, and a lock carried by one of said members including a plurality of pairs of plungers, each movable in opposite directions alternately with respect to its mate, one plunger of each pair being normally yieldably engaged with the other of said members to prevent movement of the valve member, and the other plunger of each pair being key-controlled and operable to withdraw its mate from the engaged member.

3. A locking-valve comprising a casing having an opening therein for the passage of fluid, a valve movable within the casing to open and close said opening, and a lock carried by the valve including a plurality of pairs of plungers, each movable in opposite directions alternately with respect to its mate, one plunger of each pair being normally yieldably engaged with the casing to prevent movement of the valve, and the other plunger of each pair being key-controlled and operable to withdraw its mate from engagement with the casing.

4:. A locking-valve comprising a casing having an opening therein for the passage of fluid, a valve movable within the casing to open and close the opening, and a lock carried by the valve including a plurality of pairs of plungers, each movable in opposite directions alternately with respect to its mate, the plungers being normally extended in opposite directions with one plunger of each pair engaged with the casing to prevent movement of the valve, and the other plunger of each pair being operable when moved a" predetermined distance to withdraw its mate from the casing and when moved farther than the predetermined distance to engage the casing to prevent movement of the valve. j p

' 5. A locking-valve comprising a casing having an opening therein for the passage of fluid, a valve movable Within the casing to open and closethe opening,'and a lock carried by the valve including a plurality of pairs of plungers, each movable in opposite directions alternately with respect to its mate the plungers being normally extended in opposite directions with one plungerof each pair engaged with the casing to prevent movement of the valve, and the other plunger operable when moved a predetermined distance to withdraw its mate from the casing, and when moved farther than the predetermined distance to engage the casing to prevent movement of the valve, and a key operable to move the last described plungers to said predetermined distances.

' 6. A locking valve comprising a casing having an opening therein for the passage of fluid, a valve movable within the casing to open and close the opening, and a lock carried by the valve includin a plurality of pairs of plungers, each mova le in opposite directions alternately with respect to its mate, the plungers being normally extended in opposite directions, with one plunger of each pair engaged with the casing to prevent movement of the valve, and the other plunger operable when moved a predetermined distance to withdraw its mate from the casing and when moved farther than the predetermined distance to engage the casing to prevent movement of the valve, the last described plungers of the pairs being of different lengths, and a key operable to move the latter plungers said predetermined distances.

7. A locking valve comprising a casing having an opening therein for the passage of fluid, a valve movable within the casing to open and close the opening, and a lock carried by the valve including a plurality of pairs of plungers, each movable in opposite directions alternately with respect to its mate, the plungers being normally extended in opposite directions with one plunger of each pair engaged with the casing to prevent movement of the valve and the other plunger operable when moved to a predetermined position to withdraw its mate from the casing and when moved farther than the predetermined position to engage the casing to prevent movement of the valve, the extended ends of the latter plungers of each pair being tapered, a key operable to move the latter plungers to said positions and provided with notches to receive said tapered ends and hold the plungers in said positions, and means for retracting the plungers. a v

,7 8.. A locking-valve comprising a casing having an opening therein for" thepassage of fluid, a valve movable within the casing to open and close the opening, and a lock carried by the valve including a plu rality of pairs of plungers, the adjacent sides of the mates being toothed, pinions be tween and intermeshed with the plungers to move the plungers alternately in o'ppo site directions, each with respect to its mate andyieldable means holding the plungers normally extended with one plunger of each pair engaged with the casing to prevent movement of the valve, andthe other plunger of each pairbeing key operated to with draw its mate from the casing.

9. A locking valve comprising a casing having an opening therein for the passage of fluid, a valve movable within the casing to open and close the opening, and a lock carried by the valve including a plurality of pairs of plungers, the adjacent sides of the mates being toothed, pinions between and intermeshed with the plungers to move the plungers alternately in opposite directions, each with respect to its mate, yieldable means holding the plungers normally extended with one plunger of each pair engaged with the casing to prevent movement of the valve, and the other plunger of each pair being movable to a predetermined position to withdraw its mate from the casing, and adapted when moved beyond said position to engage the casing to prevent move ment of the valve, and a key operable to move the last described plunger of each pair to said positions.

1Q. A locking-valve comprising a casing having an opening therein for the passage of fluid, a valve movable within the casing to open and close the opening, and a lock carried by the valve including a plurality of pairs of plungers, the adjacent sides of the mates being toothed, pinions between and intermeshed with the plungers to move the plungers alternately in opposite directions, each wlth respect to its mate, yieldable means holding the plungers normally ex- 115 tended with one plunger of each pair engaged with the casing to prevent movement of the valve, and the other plunger of each palr being movable to a predeterminedposit1on to withdraw its mate from the casing, 120 and operable when moved beyond said position to engage the casing to prevent movement of the valve. the latter plungers of the pairs being of different lengths and having their extended ends tapered, and a key 125 movable transversely of and adapted to move the last described plungers, said key being provided with tapered notches to receive the tapered ends and hold the plungers in said positions.

11. A locking-valve comprising a casing having a circular wall having an opening for the passage of fluid, a closedend and an open end having an internal shoulder, disks rotatable within the casing and adjacent the ends thereof, yieldable means at the closed end operable to hold the farther disk against the shoulder, a segmental valve carried between the disks and slidable adjacent the wall to open and close the opening by rotating the disks, and a key-controlled lock to normally prevent rotation of the disks.

12. A locking-valve comprising an openended casing having a circular wall, having an opening for the passage of fluid, an internal shoulder at one end of the casing, a plate of yieldable material covering the other end, disks rotatable within the casing and adjacent the ends thereof, one of said disks being engaged by the plate to force the opposite disk against said shoulder, con' trolling means on the latter disk, a segmental valve carried between the disks and slidable adjacent the wall to open and close the opening by rotation of the disks, and a key-controlled lock to normally prevent r0- tation of the disks.

In testimony whereof, I have hereunto set my hand this 8th day of March, 1917. FRED L. PEARSON.

Copies of this patent may be obtained for five cents each, by addressing the "Commissioner of Patenta,

Washington, D. G." 

